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Consent Item <br />Indian River County, Florida <br />Department of Utility Services <br />Board Memorandum <br />Date: May 2, 2023 <br />To: Board of County Commissioners <br />From: Sean C. Lieske, Director of Utility Services <br />Prepared by: Harrison Youngblood, PE, Utilities Engineer, Utility Services <br />Subject: Work Order 10 to Kimley-Horn and Associates for Engineering Services to Design a New <br />Sand Separator for the Oslo Water Treatment Plant <br />Background: <br />Indian River County Department of Utility Services (IRCDUS) owns and operates the Oslo Water Treatment <br />Plant (WTP), an 8.57 million gallon per day (MGD) facility that employs nanofiltration (NF) and raw water <br />blending to treat groundwater from the Upper Floridian Aquifer (UFA). The UFA also requires pre-treatment <br />to remove suspended debris and sand from the raw water to prevent fouling of the filtration membranes. <br />Pre-treatment of the UFA groundwater consists of a sand separator, 5 -micron cartridge filtration, and <br />chemical injection. The sand separator is an automatic self-cleaning in-line filter that filters the raw water <br />supply before entering the plant. <br />Analysis: <br />The existing sand separator has been off-line intermittently for over three years and permanently since <br />November 2022 due to the inability to obtain repair parts for the German manufactured equipment. <br />IRCDUS desires to replace the existing sand separator with one of a new make and model, and has <br />requested that Kimley-Horn and Associates (KHA) prepare design documents and permitting associated <br />with the replacement. Additionally, IRCDUS has requested the proposed sand separator replacement <br />design documents be incorporated into the ongoing South WTP Improvements project, adding the sand <br />separator replacement as a change order to TLC Diversified's existing contract. The KHA scope of services <br />details the professional engineering services for design, permitting, and construction phase services <br />associated with the sand separator replacement. Work Order 10 will include these services for a cost of <br />$52,427.00. <br />Funding: <br />Expenses for this project, in the amount of $52,427.00, will be recorded in the Utilities/South WTP <br />Membran/South R/0 Membranes & Retrofit account, number 471-169000-19503. Since this is a Utilities <br />operating capital project, the funds will come from fund balance. Utilities operating funds are derived <br />from water and sewer sales. <br />Description I <br />Account Number <br />Amount <br />Utilities/South WTP Membran/South R/O Membranes & Retrofit <br />471-169000-19503 <br />$52,427.00 <br />F:\Utilities\00_UTILITY-AGENDATEMPLATE & GUIDELI NES\2023 Agenda Items\051623\South WTP Sand Strainer Replacement 213 <br />